Improvement in hot-air furnaces



HJR ANDALL. HOT-AIR FURNACE. No.18Z,77Z. Patented on. a, 1876.

UNITED STATES PATENT OFFICE.

HENRY RANDALL, OF QUINCY, ILLINOIS.

IMPROVEMENT IN HOT-AIR FURNACES.

Specification'forming part of Letters Patent No. 182,772, dated October 3, 1876; application filed June 22, 1876.

To all whom it may concern:

Be it known that I, HENRY RANDALL, of Quincy, in the county of Adams and State of Illinois, have invented a new and useful Improvement in Hot-Air Furnaces, of which the following is a specification, reference being had to the accompanying drawings.

The invention relates to certain improve; ments in heating -furnaces; and consists in the device hereinafter more specifically described.

The object of the invention is to provide an efficient and economic heater.

Figure l is a side elevation of a device embodying the elements of the invention. Fig. 2 is a central vertical longitudinal section of same. Fig. 3 is a section through the line 1 2.

A in the accompanying drawing is the body of the furnace, preferably oval, in vertical transverse section, and provided with the lire-chamber B, open at its top, and properly separated from theinner walls of the body, to afforda passage for the products of combustion over the edge of the chamber, below which is provided the ash-pit a. The front plate, to which both chamber and pit are connected, is provided with suitable doors, opening into those receptacles.

At a suitable distance above and parallel to the body is placed, in a horizontal position,

the drum D, connected with the body by the flue E, which opens into the latter above the rear end of the fire-chamber. The rear ends of both body and drum are provided, respectively, with the smoke-pipe collar and clearing aperture F and H. The drum D is also provided with the plate I, having in it the pipeflange L, the base of the plate having a short flange, b, and an elongated one, M, the latter having a hinged damper, N,'which operates extend upward from the sides and end of the body from points below the lower edge of the fire-chamber, and enter the sides and end of the drum, as shown.

It is clear that the damper and vent H or L being closed, the passage of the products of combustion will be upward through the flues P, and that thus a vast quantity of heat will be evolved, with a comparatively small consumption of fuel.

What I claim as my invention, and desire to secure by Letters Patent, is

In a hot-air furnace the drum D, in combination with the furnace A and pipes or flues P, which connect the drum with the furnace from points in the fire-chamber opposite the ash-pit, wherefrom the, mouths of the dues are separated by an impervious wall or plate,

substantially as specified.

In testimony that I claim the foregoing improvement in hot-air furnaces, as above described, I have hereunto set my hand this 10th day of June, 1876.

H. RANDALL. J

Witnesses:

H. F. RoEsoHLAUB, FRANK RIGKER. 

